Diffuse Hard X‐Ray Sources Discovered with theASCAGalactic Plane Survey
نویسندگان
چکیده
منابع مشابه
Diffuse Hard X-ray Sources Discovered with the ASCA Galactic Plane Survey
We found diffuse hard X-ray sources, G11.0+0.0, G25.5+0.0, and G26.6−0.1 in the ASCA Galactic plane survey data. The X-ray spectra are featureless with no emission line, and are fitted with both models of a thin thermal plasma in non-equilibrium ionization and a power-law function. The source distances are estimated to be 1–8 kpc, using the best-fit NH values on the assumption that the mean den...
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We report onXMM -Newton observations of G32.45+0.1 and G38.55+0.0. These were discovered as diffuse hard X-ray sources with the ASCA Galactic plane survey, but the limited spatial resolution ofASCA could not conclude whether these are truly diffuse or a group of unresolved point-sources. XMM -Newton, with higher spatial resolution than ASCA, confirmed that G32.45+0.1 has a diffuse shell-like st...
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Diffuse Galactic gamma-ray emission is produced in interactions of cosmic rays with gas and ambient photon fields and thus provides us with an indirect measurement of cosmic rays in various locations in the Galaxy. The diffuse gamma-ray continuum is more intense than expected both at energies below 200 keV and above 1 GeV. The existing models for the high-energy excess are reviewed in the light...
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We present the first results of the Chandra and optical follow-up observations of hard X-ray sources detected in the ASCA Medium Sensitivity Survey (AMSS). Optical identifications are made for five objects. Three of them show either weak or absent optical narrow emission lines and are at low redshift ∼ 0.06. One of them is a broad line object at z = 0.910 and one is a z = 0.460 object with ...
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A 58-year-old man had 3 years history of asymptomatic, extensive, yellowish patches on his face, neck, trunk and arms. Histopathological examination confirmed the diagnosis of diffuse plane xanthomatosis. This is a rare non-lipemic disease in which xanthomatous lesions develop in the skin in association with paraproteinemia. Serum lipids are usually normal. The histological features include bot...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/374354